Fix

Fix JSON Invalid Unicode / Control Character Error

Control characters (U+0000–U+001F) inside JSON strings must be escaped. Smart quotes and non-breaking spaces from word processors also cause failures.

Open JSON Validator

Unescaped Control Characters

Raw newlines, tabs, and backspaces inside strings must be \n, \t, \b. Use JSON.stringify() to auto-escape.

Smart Quotes

Word processors produce curly quotes (\u201C \u201D) instead of straight quotes ("). Replace with standard ASCII double quotes.

Non-Breaking Spaces

U+00A0 looks like a regular space but breaks JSON parsers. Find and replace with U+0020.